RawStylusInputReport.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / Input / Stylus / RawStylusInputReport.cs / 1305600 / RawStylusInputReport.cs
                        

                        
                            using System; 
using System.ComponentModel;
using System.Windows;
using System.Windows.Threading;
using System.Windows.Media; 
using System.Windows.Input.StylusPlugIns;
using System.Security; 
using System.Security.Permissions; 
using MS.Internal.PresentationCore;                        // SecurityHelper
using MS.Internal; 



using SR=MS.Internal.PresentationCore.SR; 
using SRID=MS.Internal.PresentationCore.SRID;
 
namespace System.Windows.Input 
{
    ///////////////////////////////////////////////////////////////////////// 
    /// 
    ///     The RawStylusInputReport class encapsulates the raw input provided
    ///     from a stylus.
    ///  
    /// 
    ///     It is important to note that the InputReport class only contains 
    ///     blittable types.  This is required so that the report can be 
    ///     marshalled across application domains.
    ///  
    internal class RawStylusInputReport : InputReport
    {

        ///////////////////////////////////////////////////////////////////// 
        /// 
        ///     Constructs an instance of the RawStylusInputReport class. 
        ///  
        /// 
        ///     The mode in which the input is being provided. 
        /// 
        /// 
        ///     The time when the input occured.
        ///  
        /// 
        ///     The PresentationSource over which the stylus moved. 
        ///  
        /// 
        ///     The PenContext. 
        /// 
        /// 
        ///     The set of actions being reported.
        ///  
        /// 
        ///     Tablet device id. 
        ///  
        /// 
        ///     Stylus device id. 
        /// 
        /// 
        ///     Raw stylus data.
        ///  
        /// 
        ///     Critical: This handles critical data in the form of PresentationSource. 
        ///     TreatAsSafe:There are demands on the critical data(PresentationSource) 
        /// 
        [SecurityCritical,SecurityTreatAsSafe] 
        internal RawStylusInputReport(
            InputMode mode,
            int timestamp,
            PresentationSource inputSource, 
            PenContext penContext,
            RawStylusActions actions, 
            int tabletDeviceId, 
            int stylusDeviceId,
            int[] data) 
            : base(inputSource, InputType.Stylus, mode, timestamp)
        {
            // Validate parameters
            if (!RawStylusActionsHelper.IsValid(actions)) 
            {
                throw new InvalidEnumArgumentException(SR.Get(SRID.Enum_Invalid, "actions")); 
            } 
            if (data == null && actions != RawStylusActions.InRange)
            { 
                throw new ArgumentNullException("data");
            }

            _penContext     = new SecurityCriticalDataClass(penContext); 
            _actions        = actions;
            _tabletDeviceId = tabletDeviceId; 
            _stylusDeviceId = stylusDeviceId; 
            _data           = data;
            _isSynchronize  = false; 
        }

        /////////////////////////////////////////////////////////////////////
        ///  
        ///     Constructs an instance of the RawStylusInputReport class.
        ///  
        ///  
        ///     The mode in which the input is being provided.
        ///  
        /// 
        ///     The time when the input occured.
        /// 
        ///  
        ///     The PresentationSource over which the stylus moved.
        ///  
        ///  
        ///     The set of actions being reported.
        ///  
        /// 
        ///     Raw stylus data StylusPointDescription.
        /// 
        ///  
        ///     Raw stylus data.
        ///  
        ///  
        ///     Critical: This handles critical data in the form of PresentationSource.
        ///     TreatAsSafe:There are demands on the critical data(PresentationSource) 
        /// 
        [SecurityCritical,SecurityTreatAsSafe]
        internal RawStylusInputReport(
            InputMode mode, 
            int timestamp,
            PresentationSource inputSource, 
            RawStylusActions actions, 
            StylusPointDescription mousePointDescription,
            int[] mouseData) 
            : base(inputSource, InputType.Stylus, mode, timestamp)
        {
            // Validate parameters
            if (!RawStylusActionsHelper.IsValid(actions)) 
            {
                throw new InvalidEnumArgumentException(SR.Get(SRID.Enum_Invalid, "actions")); 
            } 
            if (mouseData == null)
            { 
                throw new ArgumentNullException("mouseData");
            }

            _penContext     = new SecurityCriticalDataClass(null); 
            _actions        = actions;
            _tabletDeviceId = 0; 
            _stylusDeviceId = 0; 
            _data           = mouseData;
            _isSynchronize  = false; 
            _mousePointDescription = mousePointDescription;
            _isMouseInput = true;
        }
 
        /////////////////////////////////////////////////////////////////////
        ///  
        ///     Read-only access to the set of actions that were reported. 
        /// 
        internal RawStylusActions Actions { get { return _actions; } } 

        /////////////////////////////////////////////////////////////////////
        /// 
        ///     Read-only access to stylus context id that reported the data. 
        /// 
        internal int TabletDeviceId { get { return _tabletDeviceId; } } 
 
        /////////////////////////////////////////////////////////////////////
        ///  
        ///     Read-only access to stylus context id that reported the data.
        /// 
        /// 
        ///     Critical: provides access to critical member _penContext 
        /// 
        internal PenContext PenContext 
        { 
            [SecurityCritical]
            get { return _penContext.Value;  } 
        }

        /////////////////////////////////////////////////////////////////////
        ///  
        ///     Read-only access to stylus context id that reported the data.
        ///  
        ///  
        ///     Critical: This handles critical data _penContext
        ///     TreatAsSafe: We're returning safe data 
        /// 
        internal StylusPointDescription StylusPointDescription
        {
            [SecurityCritical, SecurityTreatAsSafe] 
            get { return _isMouseInput ? _mousePointDescription : _penContext.Value.StylusPointDescription; }
        } 
 
        /////////////////////////////////////////////////////////////////////
        ///  
        ///     Read-only access to stylus device id that reported the data.
        /// 
        internal int StylusDeviceId { get { return _stylusDeviceId; } }
 
        /////////////////////////////////////////////////////////////////////
 
        internal StylusDevice StylusDevice 
        {
            get { return _stylusDevice; } 
            set { _stylusDevice = value; }
        }

        ///////////////////////////////////////////////////////////////////// 
        /// 
        ///     Read-only access to the raw data that was reported. 
        ///  
        /// 
        ///     Critical: Access the critical field - _data 
        ///     TreatAsSafe: No input is taken. It's safe to a clone.
        /// 
        [SecurityCritical, SecurityTreatAsSafe]
        internal int[] GetRawPacketData() 
        {
            if (_data == null) 
                return null; 
            return (int[])_data.Clone();
        } 

        /////////////////////////////////////////////////////////////////////
        /// 
        ///     Critical: Access the critical field - _data 
        ///     TreatAsSafe: No input is taken. It's safe to return the last tablet point.
        ///  
        [SecurityCritical, SecurityTreatAsSafe] 
        internal Point GetLastTabletPoint()
        { 
            int packetLength = StylusPointDescription.GetInputArrayLengthPerPoint();
            int lastXIndex = _data.Length - packetLength;
            return new Point(_data[lastXIndex], _data[lastXIndex + 1]);
        } 

        ///////////////////////////////////////////////////////////////////// 
 
        /// 
        ///     Critical - Hands out ref to internal data that can be used to spoof input. 
        /// 
        internal int[] Data
        {
            [SecurityCritical] 
            get { return _data; }
        } 
 
        /////////////////////////////////////////////////////////////////////
 
        /// 
        ///     Critical - Setting property can be used to spoof input.
        /// 
        internal RawStylusInput RawStylusInput 
        {
            get { return _rawStylusInput.Value;  } 
 
            [SecurityCritical]
            set { _rawStylusInput.Value = value; } 
        }

        /////////////////////////////////////////////////////////////////////
 
        internal bool Synchronized
        { 
            get { return _isSynchronize;  } 
            set { _isSynchronize = value; }
        } 

        /////////////////////////////////////////////////////////////////////

        RawStylusActions                                _actions; 
        int                                             _tabletDeviceId;
        ///  
        ///     Critical: Marked critical to prevent inadvertant spread to transparent code 
        /// 
        private SecurityCriticalDataClass   _penContext; 
        int                                             _stylusDeviceId;

        /// 
        ///     Critical to prevent accidental spread to transparent code 
        /// 
        [SecurityCritical] 
        int[]                                           _data; 
        StylusDevice _stylusDevice; // cached value looked up from _stylusDeviceId
        SecurityCriticalDataForSet      _rawStylusInput; 
        bool                                            _isSynchronize; // Set from StylusDevice.Synchronize.
        bool                                            _isMouseInput; // Special case of mouse input being sent to plugins
        StylusPointDescription                          _mousePointDescription; // layout for mouse points
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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